Lesson 5 - RAM Flashcards
RAM types and speeds
What is the acronym SIMM?
Single Inline Memory Module
Which RAM is no longer used, SIMM, DIMM, or RIMM?
SIMM (Has not been used in over 10 yrs)
30-pin or 72-pin layouts
What is the acronym DIMM?
Dual Inline Memory Modules
What are two DIMM’s used in Laptops?
MicroDimms
SO-DIMMs (Small Outline DIMM)
What are pin configurations of DIMMs?
168, 184, 240 - 64-bits wide
What is max capacity of a DIMM?
32gb
What are pin configs of MicroDIMM?
144-pin, 172-pin, and 214-pin
packages
What is SO-DIMM most common memory module size?
200-pins
What is RIMM?
Rambus Inline Memory Module
What are pin packages of RIMM?
184 and 232 pin
Which RAM type is covered by a thin metal shield called a heat spreader?
RIMM
Helps dissipate heat generated by the RIMM memory chips
A x32 chip puts how many bytes on the bus at once? x16 chip? x8 bit?
32 = 4 bytes at once
16 = 2
8 = 1
What is the group of modules that provides enough data for the CPU’s data bus?
Memory Bank
What is typical bus width of SDRAM?
64-bits (8 bytes of data per cycle)
How many pins are in an SDRAM module?
168 pins
What are the SDRAM clock rates?
66 Mhz
100
133
What is calculation for SDRAM data transfer rate (?
MHz * 8 (bytes) = Transfer Rate
Example:
100mHz * 8 bytes = 800mb / sec
What type of SDRAM memory transfers twice the data at the same clock speed?
DDR (DDR1)
How many pins are in a DDR1 memory module?
q8r
What is data transfer rate of DDR1 RAM?
(MHz * 2) * 8 (bytes) = Transfer Rate
Example:
(100mHz * 2) * 8 = 1600mb / sec
What are DDR2 Clock speeds? (#MHz)
100mhz 133 166 200 250
How many pins is in standard DDR2 DIMM?
240
What is data transfer rate of DDR3 RAM?
(MHz * 4) * 2 * 8 = PC3 Rating
What are DDR3 Clock Speeds (#MHz)
100mhz 133 166 200 233 266
